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(No Model.)

G. E. LLOYD.

BLAGK LEADING MACHINE.

No. 298,595. Patented May 13, 1884.

W TNESSES: INVE TOR y MW N. PETEHS. Pholohllwgnphar, wmin m. D. c.

Unites STATES ATENT trio.

GEORGE E. LLOYD, OF CHICAGO, ILLINOIS.

BLACK-LEADING MACHINE.

EPECIFICATION forming part of Letters Patent No. 298,595, dated May 13, 1884.

Application filed July 19, 1853.

T0 5% whom it may concern:

Be it known that I, GEORGE E. LLOYD, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Black-Leading Machines; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The object of my invention is to furnish a new, economical, and thorough machine for distributing what is commonly known as black 1ead'i. 0., powdered plumbago over the matrix from which an electrotype is to be takenin other words, performing the process which in electrotyping is known as metallizing. This I accomplish by a rapidly-vibrating brush, which distributes the black lead over and in the irregularities and interstices of a matrix, said matrix being placed on a bed, which is slowly reciprocated under the said brush, the whole process being performed in an airtight boX, and being actuated through the medium of the new and simple mechanism hereinafter described in the speci fication, and illustrated in the drawings, in which Figure l is a side elevation of my machine. Fig. 2 is a plan view of thesame. Figs. 3 and 4 and 6 are detail views, and Fig. 5 shows the mechanism for reciprocating the bed-plate.

In the drawings, A represents the frame of my machine, which is of a rectangular shape, and rests on four legs. Depending from the side frame, about the center of length of the same, are the hangers a a-one on either side in the lower ends of which the drive-shaft O is journaled. On one end of the shaft is the drive-pulley O, which is connected by a belt to a fast-and-loose pulley, and 011 the other end of the said drive-shaft is a small pulley O, which indirectly, as will hereinafter be explained, communicates motion to the bed-plate. The drive-shaft-is provided near either end, just within the hangers a a, and almost, if not immediately, under the side frames, with the eccentrics b I). These eccentrics b b are made (No model.)

simply by making that part of the shaft eccentric-11. e., by a displacement of the center of the same about one-third the diameter of the said shaft. Journaled on these eccentrics are the connecting-rods c c, the other end of which is pivoted to a stud projecting from a sleeve, D. This sleeve surrounds the threaded lower ends of the vertically-reciprocating rods E, which, passing upward through suitable guides in the side frame, are secured to the back of the brush F. The lower threaded ends of the reciprocating rods are provided with the nuts d-one above and one below the sleeve D thus, as will readily be perceived, making the rods and brush affixed thereto adjustable vertically.

The brush F crosses the machine from side to side, and is made, preferably, of camel shair. The back of it is secured to the top ends of the vertically-reciprocating rods E, which may be bent inward, flattened, andperforated to receive screws or other means for securing said brush.

Reciprocating longitudinally under the brush F, on suitable ways or ledges, 6 6, projecting inward from the side frames, is the bedplate G, the means for operating which Iwill now describe.

111 the side frame adjacent to the pulley 0, near the end of the machine, I make a circular hole, and insert in the same the sleeve h of the pinion h, which latter is prevented from revolving by screws or bolts passing through it into the side frame.

Journaled in the bore of the pinion h and its sleeve h is a shaft, H, which has on its inner end a sprocket-wheel, t, and on its outer end the loose pulley I. This pulley I is connected by a belt to the small pulley on the end of the driveshaft. Between the loose pulley I and the pinion h is a pinion, J, fast on the shaft II,

and projecting from an arm of the said pulley.

I is a stud, on which are journaled two small connected pinions, land at, which mesh with the pinions h andJ, respectively. The pinion it has, say, thirty cogs, and the pinion J thirty-one, and the pitch of the cogs of these two pinions are relatively different; but concerning the pinions} and m, while their pitch may be different, the number of cogs in each is the same. Thus it will be observed that with municates to the shaft H. This mechanism is adopted to materially decrease the speed of the shaft H withoiit the necessity of expensive gearing.

About midway the length of the machine, on the inside of the side frame, adjacent to the sprocket-wheel t, fast on the inner end of the shaft H, is a corresponding sprocket-wheel, m, journaled on a stud projecting horizontally from the contiguous frame. These sprockets t and m are connected by a suitable link-chain, n, and their distance apart corresponds to the length of the bed-plate G. From one of the links of this chain at there is projecting laterally a stud, a, on which is pivoted a connecting-rod, 0,, the other end of which is pivoted to a lug, g, projecting downward from the under surface of the said bed-plate. hen motion is imparted to the endless chain a by the sprocket 'i, a given point thereon, starting from said sprocket, will move forward to and around sprocket m, then back again to and around sprocket z, describing a reciprocal motion, the forward and return strokes of which are on different horizontal planes sepa rated the diameter of the sprockets. N ow, if we consider the aforesaid given point, (the stud n,) it will be apparent that through the medium of the connecting-rod it will impart a reciprocal motion to the bed-plate G.

In operation the matrix is placed on the bed-plate G and a suitable quantity of black lead sprinkled over the same. The machine is then set in operation, the bed-plate carrying said matrix back and forth under the vibrating brush as many times as is deemed nec essary to thoroughly distribute the particles of black-lead in all the interstices and depressions of said matrix, whereupon the machine is stopped and said matrix removed.

It Will thus be observed from the foregoing 5 description that my machine is cheap and of simple construction, but thorough in the accomplishment of its object.

If desired, instead of the chain m, abelt may be used; nor do I deem it beyond the scope of 5c 1. The combination of the brush, the vertically-reciprocating rods, the lower ends of which are threaded, with the sleeve placed thereon, having a laterally-projecting stud,

two nuts placed, respectively, above and below said sleeve, the connecting-rods pivoted to said stud, and eccentrics actuating said connecting-rods.

2. The combination of the bed-plate, the

link-chain, and the means described for reducing the speed of the drive-shaft, consisting of shaft H, pinion h, and sleeve h, pinion J, pulley I, and pinions land m, substantially as set forth.

3. In ablack-leading machine, the vibrating 7o brush and. means for operating the same, consisting of the drive-shaft, eccentrics thereon, and connecting rods or links, in combination with the reciprocating bed-plate and means for operating the same, consisting of the endless chain and pitman, and devices, as described, for reducing the speed of the driveshaft and imparting the same to said endless chain, substantially as set forth.

In testimony that I claim the foregoing as my own I hereunto aflix my signature in pres ence of two witnesses.

GEORGE E. LLOYD.

Witnesses:

J urns H. CoYNn, FRANK D. THOMASON. 

